Self-locking anti-loosening rubber gasket and screw thread pair thereof

Abstract

The invention discloses a self-locking anti-loosening rubber gasket and a screw thread pair thereof. The self-locking anti-loosening rubber gasket is characterized in that, on the cross section of theself-locking anti-loosening rubber gasket (1), at least one protruded rubber tooth claw (3) with a rectangular cross section is arranged on one side or two sides of the base ring (2) of the rectangular rubber gasket; the thread pair (6) is provided with the self-locking anti-loosening rubber gasket (1). Screw rods (13) of the thread pair (6) penetrate through screw holes (11) of a fastened memberB (10) and a fastened member A (9), and exposed parts of the screw rods (13) are sleeved with the self-locking anti-loosening rubber gasket (1) and screwed with a nut (7) respectively and fastened; or, the screw rods (13) of the thread pair (6) penetrate through an inner hole (17) of the self-locking anti-loosening rubber gasket and the screw hole (11) of the fastened member A (9), and the screwrods are screwed into an inner thread (12) of the screw hole of the fastened member B and are fastened. The tooth claw (3) falls in the screwing direction of the nut (7) or a bolt head (18), is flattened, and is obliquely supported between the nut (7) or the bolt head (18) and the fastened member A (9) to achieve the purpose of self-locking anti-loosening and retaining.

Description

technical field [0001] The invention relates to the field of fasteners, in particular to a self-locking anti-loosening rubber washer and a thread pair thereof. Background technique [0002] In the field of fasteners, frictional locking is the most widely used form of locking, as described in my invention patent application "Locking Method of Nuts and Bolts and Locking Washers" Application Publication No. CN110206810A: A rubber washer is provided around the outer wire of the bolt between the fastened part A, the nut is tightened, the rubber washer is squeezed, and the deformation is filled in the four nuts, the fastened part A, the bolt and the rubber washer In the gap between, the rubber washer is extruded by the rebound expansion force after being squeezed, so that the friction force between the four is increased, and the elastic fixation is integrated, so that the nut will not appear to retreat and relax. Lock bolts, fastened parts A and nuts to achieve the purpose of ant...

AI Technical Summary

Problems solved by technology

In the case of shock, vibration and variable load, the force of the loosening and tightening of the nut on the screw rod of the bolt is opposite to the direction of the screw, and the force is the same. Since the nut cannot be tightened continuously in the direction of vibration, the nut The pre-tightening force on the screw will decrease due to slack. As the number of vibrations increases, the lost pre-tightening force will increase slowly, which will eventually cause the nut to loosen in the direction of relaxation, unable to stop back, and the threaded connection will fail.

[0003] In addition, there are many fasteners with better anti-back effect in the prior art. For example, two nuts are respectively provided with convex parts and grooves, wherein the grooves are concentrically arranged on the nuts, and the convex parts are non-concentrically arranged on the nuts. On the other nut, by twisting the nut with the convex part, the convex part is squeezed into the groove, so that elastic deformation occurs between the two nuts, and at the same time, the screw rod is forced to produce corresponding elastic deformation, resulting in Larger engagement force makes the nut achieve the effect of stopping the retreat. Its disadvantages are high processing accuracy, high cost and inconvenient disassembly.

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